/**
 * Created by cj on 2017/5/8.
 */

var Macbook = function(){
//...
};
var MacbookWith4GBRam = function(){},
    MacbookWith8GBRam = function(){},
    MacbookWith4GBRamAndEngraving = function(){},
    MacbookWith8GBRamAndEngraving = function(){},
    MacbookWith8GBRamAndParallels = function(){},
    MacbookWith4GBRamAndParallels = function(){},
    MacbookWith8GBRamAndParallelsAndCase = function(){},
    MacbookWith4GBRamAndParallelsAndCase = function(){},
    MacbookWith8GBRamAndParallelsAndCaseAndInsurance = function(){},
    MacbookWith4GBRamAndParallelsAndCaseAndInsurance = function(){};